Boiler-furnace



Patented Jan. 31, 1893.

aff

T. J. GROSH. BOILER FURNACE.

A M-v-VAAVM u (No Model.)

W/TNESSES UNITED STATES PATENT OFFICE.

THOMAS J. GROSH, OF SAVANN A, ILLINOIS.

BOILE'R-FURNACE.

SPECIFICATION forming part of Letters Patent No. 490,962, dated January31, 1893.

Application filed April 15, 1892. Serial No. 4291289- (NO 111041610 Toall whom t may concern:

Be it known that I, THOMAS J. GRosH, of Savanna, in the county ofCarroll and State of Illinois, have invented a new and ImprovedBoiler-Furnace, of which the following is a full, clear, and exactdescription.

The object of the invention is to provide a new and improved boilerfurnace, which is simple and durable in construction, very effective inoperation and arranged to prevent all leakage at the water tubes.

The invention consists of certain parts and details, and combinations ofthe same, as will be hereinafter described and then pointed out in theclaim.

Reference is to be had to the accompanying drawing forming a part ofthis specification, in which the figure is a sectional side elevation ofthe improvement.

The improved boiler furnace is provided with the usual outer cover A,set on abase B, supported on a suitable foundation C, forming the ashpit. In this cover or casing A is arranged the exterior shell D, madecylindrical at its upper part, andinverted cone shaped at the lowerpart, as plainly illustrated in the drawing; the lower end beingfastened by rivets or other means to a ring E, supported on the base Bdirectly above the foundation O.

To the inside of the ring E is riveted or otherwise secured the lowerinverted cone shaped end F', of the shell of the lire box F, formed inthe small end near the bottom with a suitable grate G, on which the fuelto be burned is placed, the said grate discharging or opening into thefire box formed in the foundation C, an opening B in the base making theconnection. The fire box Fis the upper part F2, made cylindrical .toform a combustion chamber into which extend the water fines H, each madeof lap-welded iron, bent at right angles, as shown, without any elbowsWhatever, the ends H of each tube being expanded and calked in the sidesand top of the iire box F.

It is understood that the space between the shell of the fire box F andthe exterior shell D forms the usual water compartment, the watercirculating through the tubes H, so that the water is rapidly heated bythe burning fuel in the combustion chamber of the rebox F. It is furtherunderstood that the Water flows in through the lower horizontal arms ofthe tubes H and rises in the vertical parts to discharge on top of thefire box into the water compartment, so that a complete circulation ofthe water is established in the water compartment.

In the side of the re box F is arranged a smoke and gas outlet I,connecting a smoke line I', held on the casing A and extending into thesaid outlet I. On the top of the fire box F is formed anupwardly-extending annular iiange F3, onto which is,riveted a sleeve Jextending upwardly onto the inside of a ring K', bolted or otherwisefastened to the under side of the cover K, for the exterior shell D.

On the inner surface of the shell D and at the upper edge of the same issecured, by bolts or rivets, a ring D on which rests the cover K, thesaid cover being adapted to be fastened to the said ring by bolts,which, when removed permit of lifting oft the said cover so as to allowready access to the upper ends of the flues H, for expanding or calkingpurposes. Through the sleeve J passes the filling tube L, through whichthe fuel is introduced into the re box F it being understood that thelower end of the said filling tube L extends to about the junction ofthe cylindrical part of the fire box With the conical part, as will bereadily understood by reference to the drawing. Opposite the horizontalends of the Iiues I-I are screwed in the exterior shell B, screw plugsN, which, when removed give ready access to the ends of the flues in thesides of the fire box F for expanding Orcalking purposes.

It is understood that by constructing a boiler furnace in this manner,no leakage whatever is possible, as the ends of the water flues I-I canbe readily attended to, that is expanded and calked, so as to preventall leakage. As no elbows whatever are employed on the Water tubes, noleakage is possible within the lire box from such a cause.

Having thus fully described my invention, I claim as new and desire tosecure by Letters Patenu* In a boilerfurnacethe combination with anexterior cylindrical shell having an inverted cone-shaped lower end, ofa ire box arranged concentric within the shell and provided with IOO aninverted cone-shaped lower end for the fuel and arranged concentric tothe end of the said shell, the said shell forming a Water compartmentWith the said fire-box, and Wa- 5 ter lues having their ends expandedand calked in the top and cylindrical sides of the said fire box, thesaid tubes extending in the combustion chamber of the tire box and openat their ends into the said water compart- Io ment, a sleeve connectingthe top of the fire box with the removable cover of the said shell and alling tube extending through the said sleeve below the said water finesto deliver the fuel into the cone-shaped end of the fire box,substantially as shown and described.

THOMAS J. GROSH. Witnesses:

` JOHN H. TUTTLE,

JOSEPH MCGRAIL.

